baber/WOPTO huggingface dataset:
Patent GB-1258666-A (GB)
IPC: G08B13/26
Filed: 1969-02-11
Abstract: 1,258,666. Transistor switching circuits. AMERICAN DISTRICT TELEGRAPH CO. 11 Feb., 1969 [11 March, 1968], No. 7324/69. Heading H3T. [Also in Divisions G1 and G4] In an alarm system (see Division G4) two parallel channels are responsive to the output of a common sensor one channel having a comparatively slow response but sensitive to small changes in the monitored ambient condition whilst the other channel has a faster response but is responsive only to large changes in said condition. The output from the second channel as a result of large changes in the condition is arranged to inhibit operation of the alarm. The invention is applicable to prevention of false alarms due to ambient changes caused by spurious conditions. Figs. 6 and 7 show a smoke detector of the type which is actuated by interposition of smoke between a lamp (not shown) and a photo-cell PC. The lamp is modulated at 30 Hz., the resulting modulation being received by the photo-cell PC and amplified by transistors Q1, Q2, tuned to 30 Hz. and rectified by a voltage doubler D2, D3. In the event of small reduction in modulation due to presence of smoke, the current in transistor Q3 is reduced, so that after a delay caused by capacitor C10, a trigger circuit Q4, Q5 is operated which energizes an alarm relay AL. In the event of a major reduction in the modulated light receivedby PC (e.g. due to a foreign body being interposed between the lamp and PC), the modulation from the collector of Q2 is severely reduced so that even after amplification by Q7, Q8 the voltage is insufficient to maintain the trigger Q9, Q10 in a conductive state so that relay TR is released thereby inhibiting the alarm. Contacts TR2 may be arranged to operate a trouble indicator. A voltage regulator D8, D9, Q6 is included which feeds an automatic gain control voltage via resistors R15, R16 to Q1 so as to compensate for changes in supply voltage to the lamp (not shown).
Patent GB-1258997-A (GB)
IPC: F16J13/18
Filed: 1969-11-20
Abstract: 1,258,997. Releasable fastenings. SERCK INDUSTRIES Ltd. 20 Oct., 1970 [20 Nov., 1969], No. 56927/69. Heading E2B. [Also in Division F2] An over-centre fastener comprises a lever 6 adapted to be pivotally mounted adjacent to one end thereof on one, e.g. a door 12 of a pair of members to be secured together the lever being formed between the pivot and the other end thereof with a hook, and an eyelet 9 on the other of the pair of members. The arrangement is such that when the two members are disposed with the hook and eyelet adjacent to one another the hook can be engaged in the eyelet so that subsequent rotation of the lever in one direction will draw the two members towards one another and will cause the lever to assume a stable "over centre" position. As shown, the eyelet 9 is mounted on a member screwed into a support block 11  secured to the door frame 2, the door hinges 5 being similarly adjustable. The door has a channel portion 22 receiving a deformable gasket 1, and may have an insulating slab 10 held in position by a lagging plate 4. The frame 2 of channel section may be replaced by one of angle section.
Patent GB-1264781-A (GB)
IPC: B41M3/14
Filed: 1967-12-11
Abstract: 1,264,781. Security papers &c. PORTALS Ltd., and UNITED KINGDOM ATOMIC ENERGY AUTHORITY. 5 March, 1969 [11 Dec., 1967], No. 56292/67. Heading B6A. Security papers such as cheques, bank notes, bonds, plaques, credit cards or identity documents or plastics cards have incorporated in their interior during manufacture a radiation sensitive dye which is subsequently treated by irradiation with electrons in a non-uniform manner so as to cause a non-uniform change in the colour of said dye. In one embodiment fibres of rayon, which are treated with a blue dye of the leuco tri-aryl methane group and sensitive to radiation and with a yellow dye that is not sensitive to radiation, were added to the paper stock and uniformly distributed therein. The paper manufactured from the paper stock was then subjected to irradiation with electrons which had an energy of 75 to 90 kcV. and which were made to pass through a density wedge made of " Mylar " (Registered Trade Mark), having a thickness of from 0À00 to 0À01 inch. The irradiation on passing through the wedge was attenuated in that the rayon fibres showed a progressive change of colour over the whole length of the paper from yellow to green (the blue dye being transparent prior to irradiation). The colour change was inversed on the obverse side of the paper. In another embodiment, a blue dye was used which was bleached on irradiation with electrons. In a further embodiment polyvinyl chloride threads which are inherently sensitive to irradiation were treated with dimethyl-yellow, an acid-sensitive dye. On irradiation, the liberation of hydrogen chloride and a consequent reaction brought a change in colour from yellow to red.
Patent GB-1288545-A (GB)
IPC: D06L3/12
Filed: 1970-01-29
Abstract: 1288545 Optical brightening FARBWERKE HOECHST AG 29 Jan 1970 [30 Jan 1969] 4340/70 Heading DIP  Fibrous materials of polymers comprising at least 85% of polyacrylonitrile are optically brightened by impregnating the material with a liquor containing a brightener of general formula in which A represents a branched or unbranched C 2-4  alkylene group, R<SP>1</SP> represents a C 1-4  alkyl group, R<SP>2</SP> represents a C 1-4  alkyl group or the two radicals R<SP>2</SP> together with the nitrogen atom form a saturated heterocyclic ring, X represents a colourless anion and n is 1 or 2, adjusting the liquor content of the material to 5-120% by weight referred to the material and heating, preferably with steam, for 2 seconds to 30 minutes at 100-150C. If the brightened fabric is to be printed immediately it is preferably subjected to intermediate drying at 50-150C. Thickeners, for example, starch ether, tragacanth, carob bean flour and crystal gum, are added to prevent migration of the optical brightener during drying. Enhanced brightening is achieved when a non-ionic condensation product of a fatty acid and oxyethylated ammonia and/or a quaternary condensation product of a fatty acid and a low molecular weight aliphatic polyamine is added to the brightening liquor. A second brightener of general formula in which A, R<SP>1</SP>, R<SP>2</SP>, X and n have the meanings specified above, shows a greenish-blue fluorescence and is able when applied in admixture with the compounds of formula II, to compensate the reddish tint of the latter.
Patent GB-1289845-A (GB)
IPC: B63G7/04
Filed: 1969-09-29
Abstract: 1289845 Shearing MINE SAFETY APPLIANCES CO 29 Sept 1969 [30 Sept 1968] 8260/72 Divided out of 1289844 Heading B3W The description is substantially identical with that of Specification 1,289,844 but the claim relates to a cable cutter for cutting underwater, comprising a frame 6, an anvil 20 attached to the frame, and forming therewith a cablereceiving recess 26, a chisel 8 movable across the recess to cut a cable 27 located in the recess against the anvil by explosive means 12, firing means 14, a passage 39 communicating at one end with the firing means and open at the other end to the ambient water, a vent 11 communicating with the passage, a firing rod 16 being restrained to lie adjacent the open end of the passage when the cutter is cocked for firing, closure means 9 on the rod for closing the vent after initial actuating movement of the rod and means for releasing the rod so that it forces water in the passage against the firing means.
Patent GB-1290954-A (GB)
IPC: C08G73/16
Filed: 1970-03-18
Abstract: 1290954 Laminates G T SCHJELDAHL CO 18 March 1970 12990/70 Heading B5N [Also in Division C3] Polyester-imides useful as laminating adhesives are prepared by a process which comprises (a) condensing one mol. of an aromatic dianhydride with 3 to 5 moles of a C 6  to C 9  polymethylene lactam; (b) esterifying the resulting product with an aliphatic diol that is capable of being removed by distillation; and (c) polycondensing the resulting ester until the molecular weight of the polyester-amide-imide is between 5000 and 15,000. Specified reactants are: dianhydride-pyromellitic, 3,3<SP>1</SP>,4,4<SP>1</SP>-benzophenone and 1,4,5,8-naphthalene; lactamscapro- and caprylic; and diols--ethylene glycol, triethylene glycol and dihydroxymethyl cyclohexane. Antimony oxide, zinc borate or titanium isopropylate may be used to catalyse the esterification. The resins are soluble, e.g. in halohydrocarbons or dimethyl formamide or acetamide and may be modified with aromatic di-isocyanates, e.g. 2,4-toluene di-isocyanate. Laminates.-The resins are useful as laminating adhesives especially for laminating plastics films to metal, e.g. Cu or Al, foils for high temperature electrical applications. In Example 2 a 10 wt. per cent solution of a resin from caprolactam, pyromellitic anhydride (4 : 1 mols.) and ethylene glycol in 1,1,2-trichloro ethane to which 5% (by weight of resin) 2,4-toluene diisocyanate is added is applied at a film thickness of 0À5 to 1 mm. to a proprietary polyamide-imide film, dried at 100‹ C., and then laminated at 230‹ to 245‹ C. to copper foil by a roll-to-roll technique. The laminate is post-cured at 150‹ C. and then 205‹ C. for two hours each.
Patent GB-1295742-A (GB)
IPC: C07C239/00
Filed: 1970-08-19
Abstract: 1295742 Treatment of urea-synthesis effluent MITSUI TOATSU CHEMICALS Inc 19 Aug 1970 [30 Aug 1969] 39911/70 Heading C2C Unreacted materials are separated from a urea-synthesis process obtained by reacting ammonia and carbon dioxide and containing urea, water, ammonia and carbon dioxide, by a high pressure distillation at 10-100 kg./cm.<SP>2</SP> gauge to remove the greater part of the unreacted ammonia and carbon dioxide as a gaseous mixture and separating the remaining unreacted materials at a low pressure by introducing the depleted urea-synthesis effluent into a low pressure rectification zone maintained at a pressure up to 5 kg./cm.<SP>2</SP> gauge and a head temperature of 60-120‹ C., heating the urea solution from the rectification zone in a heating zone maintained at 100-140‹ C. to drive out the remaining unreacted materials as a gaseous mixture of carbon dioxide and ammonia, and stripping urea solution from the heating zone in a stripping zone by contact with 0À01 to 0À2 mol. of carbon dioxide per mol. of urea.
Patent GB-1296645-A (GB)
IPC: C22F1/08
Filed: 1971-05-28
Abstract: 1296645 Grain-refined brass; heat treatment OLIN CORP 28 May 1971 17965/71 Heading C7A A composite material consisting of at least two materials one at least of which is a brass containing 5-35% Zn and one or more of Fe, Co, P, Ca as grain growth inhibitor is cold worked and annealed at 575-1000‹C. toeffectrecrystallisation and produce a grain size in the brass of 0À005 to 0À025 mm. The preferred ranges of inhibitor are 0À4-3% Fe, 0À1-1À5% Co, up to 0À1% P, up to 0À1% Ca. The material may be used for heat exchangers, electrical and builders fittings, automotive components, shipping containers and decorative purposes.
Patent GB-1297991-A (GB)
IPC: A61N1/36
Filed: 1970-02-17
Abstract: 1297991 Apparatus for influencing blood pressure LKB MEDICAL AB 17 Feb 1970 [24 Feb 1969] 7643/70 Heading ASR [Also in Division G3] Apparatus for influencing the blood-pressure regulatory system of a patient comprises an electrode 5 or 6 for application on or close to an afferent nerve from a baroreceptor, a transducer 8 operative to give an output signal substantially representing the instantaneous arterial blood pressure, signal-transforming means, 10 to 14, receiving said output signal and providing an output signal including a component proportional to the mean value of the transducer output and permissably but not necessarily including a component proportional to the time-derivative of the transducer output, and a frequency-controlled pulse generator 7 receiving the output of the signal-transforming means as a frequency-control signal for generating output pulses with a pulse-repetition rate proportional to the magnitude of the output of the signal-transforming means, the generator output being applied to said electrode. The outputs from circuits 10 and 11 of the signaltransforming means are fed via variable circuit elements, for example potentiometers, 12, 14 respectively, to a summing circuit 13 supplying the control signal for a pulse generator 7. Generator 7 has two outputs feeding pulse series to electrodes 5, 6, one output of generator 7 being delayed relative to the other by a time less than the shortest interval between two successive pulses in a pulse series. The pulse series have a mean p.r.f. determined by the mean blood pressure and a modulation of the p.r.f. determined by the time derivative of the blood pressure. Generator 7 has a threshold level for the control signal, below which no pulses are generated, corresponding to a constant blood pressure of about 40-50 mm. Hg. The p.r.f. range of the pulse series is 0-300 Hz, generator 7 becoming "saturated" at the upper p.r.f. when a control signal corresponding to a constant blood pressure in excess of about 250-300 mm. Hg. is received. The device is preferably used to reduce blood pressure in hypertensive patients, the p.r.f. of the pulse series increasing to a maximum value during an initial relatively short portion of the duration of each pulse series and thereafter decreasing continuously. The two electrodes 5, 6 and the transducer 8 may be implanted, being coupled to external circuitry by wires, or inductively. Alternatively, the whole device, including inductively-rechargeable batteries, may be implanted.
Patent GB-1301308-A (GB)
IPC: A01B63/10
Filed: 1970-11-06
Abstract: 1301308 Tractor power lift mechanism VSEROSIISKY ORDENA TRUDOVOGO KRASNOGO ZNAMENI NAUCHNO-ISSLEDOVATELSKY INSTTTUT MEKHANIZATSII I ELEKTRIFIKATSII SELSKOGO KHOZYAISTVA 6 Nov 1970 52900/70 Heading A1P In a power lift mechanism a toggle linkage 7, 8 is operated by a double-acting hydraulic actuator 3 having a piston 25 containing a valve 26 which acts to interconnect the two pressure spaces of the actuator at the ends of its stroke to prevent overload in the hydraulic system. The valve 26, Fig. 2, comprises a fluted stem 29 sliding in a hole through piston 25 and carrying on each end a head 27 having a sealing surface 28. When slide valve 4 is operated to direct hydraulic fluid from reservoir 6 and pump 5 into the left hand pressure space the valve will close by moving to the right and piston 25 will begin to move to the right. The actuator 3 is pivotally mounted to the tractor 11 at 22 and its ram 23 is connected to the centre hinge 24 of toggle linkage 7, 8, hinged to the tractor at 10 and to a lifting lever 13 at 12, so that the motion of piston 25 is transmitted to the toggle linkage and the lifting lever. Thus, lifting lever 13 is turned anticlockwise about its hinge 14 and this motion is transmitted to lever 16a, also pivoted at 14, when pin 15 on lever 13 meets stop 16 on lever 16a. The implement 2 is raised by the motion of lever 16a which lifts link 19 via link 18. As the piston 25 nears the end of its travel the toggle linkage passes through the in-line position, at which point the implement is at its highest, and begins to bend in the opposite sense the action of the ram now being assisted by the weight of the implement. Eventually piston 25 abuts end plate 31a and the toggle linkage is restrained from collapsing further. The valve 26 is opened by its right hand head 27 striking plate 31a slightly before piston 25. The slide valve 4 is set to neutral when fluid is circulated through a by-pass line. The implement may be lowered by a further movement of slide valve 4 the valve 26 operating in a similar manner. Lifting lever 13 may be rigidly connected to lever 16a so that the implement may be forced downwards in use.
Patent GB-1305947-A (GB)
IPC: F23D11/10
Filed: 1970-07-06
Abstract: 1305947 Air heating stoves; oil burner LAIDLAW DREW & CO Ltd 5 Oct 1971 [6 July 1970] 32540/70 Headings F4K and F4T A direct fired air heater comprises an elongated housing 1 containing a combustion chamber comprising a plurality of separated radially extending combustion chamber segments 4 arranged about a support plate 3 for a fluid fired burner 11. Each combustion chamber segment comprises a channel shaped sheet metal structure which is closed at one end and consists of a pair of oppositely disposed side plates 6, a base-plate 7, and an end closure plate 8 by which the segment is secured to the burner support plate 3. The open side of each segment faces inwards towards the axis of the housing 1 and the open end faces towards the outlet end 2 of the housing. Holes 14 are provided in the end plates 8 and the support plate 3 for passage of combustion air. The burner is supplied with fuel and air by way of pipe-lines 15 and 16. An igniter 13 is also provided. In use air from a fan located in a fan chamber 18 is passed through the housing 1. A proportion of this air passes into the segments 4 through the holes 14 for combustion purposes, whilst the remainder passes over and between the segments 4 and thereafter mixes with the products of combustion passing out of the open ends of the segments. The air-combustion gas mixture finally leaves through an outlet 2 at one end of the housing. As shown the burner 11 comprises a pair of concentric tubes 20, 21 at the end of which is a nozzle arrangement providing a plurality of circumferentially spaced radially extending pairs of aligned holes 34, 36. In use oil supplied through the centre tube 21 flows outwardly through transverse bores 30 and backwards along an annular passageway 38 to a position between the aligned holes 34, 36. Air under pressure passes through the annular passage 22 between the two tubes 20, 21 and then outwards through the holes 34, 36 where it entrains the oil and causes an oil/air mixture to be projected radially outwardly towards each of the combustion chamber segments 4.
Patent GB-1306905-A (GB)
Title: Spectacle frames
IPC: F21V33/00
Filed: 1971-06-09
Abstract: 1306905 Lamps T G JOY 7 Jan 1972 [9 June 1971] 19746/71 Heading F4R An electric lamp is recessed in each side-piece of a spectacle frame to illuminate nearby objects viewed by the wearer.
Patent GB-1317527-A (GB)
Title: Process for preparing pure hydrated alumina
IPC: C01F7/142
Filed: 1971-07-14
Abstract: 1317527 Hydrated alumina MITSUBISHI CHEMICAL INDUSTRIES Ltd 14 July 1971 33123/71 Heading ClA Pure hydrated alumina is prepared by passing CO 2  into an aqueous solution of sodium aluminate (prepared, e.g. by dissolving bauxite ore, hydrated alumina or aluminium in NaOH solution) to form a slurry of hydrated alumina, washing the slurry with water to elute the sodium (e.g. to lower the pH to less than 12), heating the slurry to above 100 C. under a superatmospheric pressure of CO 2  (e.g. gauge pressure of 10-20 Kg/cm.<SP>2</SP>) and then separating the hydrated alumina from the slurry. By varying the heating temperature different forms of alumina are produced, e.g. bayerite is formed by heating to 100-170 C. and boehmite by heating to 180-300 C.
Patent GB-1323058-A (GB)
Title: Construction materials
IPC: C04B26/16
Filed: 1969-09-30
Abstract: 1323058 Cement composition T PRENDERGAST 9 Oct 1970 [30 Sept 1969] 47976/69 Heading C1H [Also in Division C3] A setting composition contains oil modified polyurethane and linseed oil putty. Cement, oil bound mastic, sand, plaster of Paris, wood flour, latex cement, cork granules, expanded polystyrene, rubber granules or granite chippings individually or in admixture may also be included.
Patent GB-1331595-A (GB)
Title: Method of producing conductive tracks upon insulating substrates
IPC: H01J17/49
Filed: 1972-06-29
Abstract: 1331595 Printed circuits; gas discharge display panels STANDARD TELEPHONES & CABLES Ltd 29 June 1972 30405/72 Headings H1D and H1R Gold thick film ink 20 is drawn across a glass plate 21 by a blade 22. Notches in the blade 22 leave parallel tracks 23 of ink. The plate is heated to cure the ink and make it conductive. Alternatively an ink which is initially conductive can be used. The tracks 23 are covered with glass frit which is fused to provide an insulating  layer. The blade 22 may be a thin strip with notches made by coining, or a stack of alternate copper and steel laminations (31, 32, Fig. 3,  not shown) with the edge first ground flat and  then etched by a solution which attacks the  copper preferentially. A gas discharge display matrix (Fig. 1, not shown) comprises two plates (2, 3) formed as above and mounted face to face on opposite sides of a spacer frame (1), to form a gas-tight envelope.
Patent GB-1332922-A (GB)
Title: Fluid ducts and drying and conveying apparatus
IPC: B65G53/18
Filed: 1970-10-20
Abstract: 1332922 Pneumatic conveyers P WESTERBY 20 Oct 1970 49775/70 Heading B8A [Also in Divisions F2 and F4] A duct for a gas or liquid is provided with slits each having one edge more rigid than the other to permit resilient displacement of the less rigid edge so as to vary the outlet cross-section of the slits.  Grain 4 is dried as a batch in a chamber 2 provided with the ducts, which are supplied with heated air by a fan 8 and have the slits 13 in their vertical side walls. During drying, the pressure of grain 4 on the duct walls causes inward deflection of the less rigid edges 19, Fig. 4, so as to widen the slits 13 so that large quantities of air can pass. When the grain is dry, the dampers 12 are opened so that the grain near them will run down discharge shoots 9 on to a conveyer 10 (until it reaches its angle of repose 18) so relieving the pressure on the walls and hence narrowing the nearby slits 13 so as to increase the air velocity for promoting discharge of the grain. Alternatively, the slits may be narrow when the ducts are being pressed, and wide during discharge. The one slit edge is made rigid by bending (Fig. 4) or bending to form an angle or back on itself, or by a welded reinforcement.
Patent GB-1335010-A (GB)
Title: Method of reducing the influence of undesired birations on  the quality of a workpiece during cylindrical grinding
IPC: B24B49/04
Filed: 1972-04-10
Abstract: 1335010 Grinding WERKZEUGMASCHINENKOMBINAT 7 OKTOBER BERLIN VEB 10 April 1972 16409/72 Heading B3D A method of reducing the influence of undesired vibrations on the quality of a workpiece 1 during cylindrical grinding comprises, shortly before the end of the machining cycle, triggering a signal so that the rotary speed of the workpiece undergoes acceleration and this acceleration is only switched off after the required dimension is reached. In apparatus for carrying out the method, the grinding wheel 4 is mounted on a spindle 5 and the workpiece 1 is mounted on a spindle 2 driven by a D.C. motor 3. A gauge 6 continuously monitors the workpiece and is connected to a control unit 7 whereby, immediately after a predetermined size of the workpiece is reached and preferably during sparkout, the unit actuates a system 11 to accelerate the motor 3 until the final dimension is reached.